Invention Grant
- Patent Title: Optical disc device, method for activating optical disc device, and control circuit
- Patent Title (中): 光盘装置,激活光盘装置的方法和控制电路
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Application No.: US12470100Application Date: 2009-05-21
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Publication No.: US07948835B2Publication Date: 2011-05-24
- Inventor: Ryutaro Futakuchi , Masahiro Birukawa
- Applicant: Ryutaro Futakuchi , Masahiro Birukawa
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack L.L.P.
- Priority: JP2008-135131 20080523
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
An optical disc device includes: a light source; a condensing system including a solid immersion lens for emitting light from the light source onto an optical disc; a gap control circuit for setting a distance between the solid immersion lens and the optical disc to a constant value; a CPU for adjusting a condensing position of emission light from the solid immersion lens with respect to an information recording/reproducing surface of the optical disc by moving a concave lens in a direction of an optical axis; and a focus control circuit for setting the condensing position on the information recording/reproducing surface, while following plane displacement of the information recording/reproducing surface, using a focus error signal. The CPU is operable to correct coma aberration in focus position adjustment by moving the concave lens in a direction perpendicularly intersecting with the optical axis.
Public/Granted literature
- US20090290456A1 OPTICAL DISC DEVICE, METHOD FOR ACTIVATING OPTICAL DISC DEVICE, AND CONTROL CIRCUIT Public/Granted day:2009-11-26
Information query
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